Examine source code of Multi Crypto Ticker

{
  "name": "Multi Crypto Ticker - Toolbar price monitor",
  "description": "Monitor cryptocurrency prices in a unique, efficient way.",
  "manifest_version": 2,
  "version": "2.1.6",
  "icons": {
    "128": "img/default.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "contextMenus"
  ],
  "browser_action": {
    "default_icon": "img/default.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "service.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e0f7c828-d503-48de-9eb4-dfa6b17bd86a}"
    }
  }
}